42656553378 has 12 divisors (see below), whose sum is σ = 92422532358. Its totient is φ = 14218851120.

The previous prime is 42656553347. The next prime is 42656553389. The reversal of 42656553378 is 87335565624.

42656553378 is a `hidden beast` number, since 4 + 2 + 6 + 56 + 553 + 37 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 34561412649 + 8095140729 = 185907^2 + 89973^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1184904243 + ... + 1184904278.

Almost surely, 2^42656553378 is an apocalyptic number.

42656553378 is an abundant number, since it is smaller than the sum of its proper divisors (49765978980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42656553378 is a wasteful number, since it uses less digits than its factorization.

42656553378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369808529 (or 2369808526 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 54.

The spelling of 42656553378 in words is "forty-two billion, six hundred fifty-six million, five hundred fifty-three thousand, three hundred seventy-eight".